Conductive metal inserts in rotor dynamoelectric machine

Details Conductive metal inserts in rotor dynamoelectric machine Conductive metal inserts in rotor dynamoelectric machine

1987-12-10

1989-06-27

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 45, 310156, 310192, 310261, H02K 348

Patent

active

048432717

ABSTRACT:
A rotor of a dynamoelectric machine includes a coating of a high-conductivity metal covering a substantial portion of the surface thereof. The high-conductivity metal reduces resistive heating produced by eddy currents from high-frequency harmonics of an AC power source. In one embodiment of the invention, surfaces of dovetail wedges retaining energizing conductors in logitudinal slots are coated with a copper coating. The pole regions of the rotor include undercut slots to retain chamfered wedges of magnetic material coated with a high-conductivity metal. Retaining rings at opposed ends of the rotor may also be coated with a high-conductivity metal.

REFERENCES:
patent: 4242610 (1980-12-01), McCarty
patent: 4275324 (1981-06-01), Flick
patent: 4332079 (1982-06-01), Silver
patent: 4336649 (1982-06-01), Glaser
patent: 4339874 (1982-07-01), McCarty
patent: 4363986 (1982-12-01), Joho
patent: 4486678 (1984-12-01), Olson
patent: 4631435 (1986-12-01), McCarty

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